Grinding or polishing wheel



(No Modell.)

L. R. NOURSB-1 GRINDING 0R POLSHING WHEEL.

No. 358,412. Patented Malnfl, 1887.

fbg/M l v V Skov/44120@ ffl/Wm Y UNITED VSquires 'PATENT OFFICE.

LUCIAN R. NOURSE, OF CHICAGO, ILLINOIS.

GRINDING on PioLlsHlNe WHEEL..A

SPECIFICATION forming part of Letters; Patent N o. 358,472, dated March1, 1887. Application filed my sa, issn. serial No. 203,025. (No model.)

y To @ZZ whom it may concern:

Be it known that I, Lucian R. Nounsn, a citizen of the United States,residing at Chi cago, in the county of Cook and State of'lllinois, haveinvented certain new and useful Improvements in Grinding or Polishing`Wheels; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

The invention relates to grinding and polishing Wheels, and has for itsobject the construction of a device that can be readily adjusted,perfectly balanced, and securely held in position with thesmallestnumber of adjusting means.

'Ihe invention will be hereinafter described, and particularly pointedout in the claims.

In the accompanying drawings, which form a part of this specification,Figure l is a perspective of the inelastic ring surrounded by a flexibleband. Fig. 2 is a like view of one section of the hub, showing theinterior thereof; Fig. 3, a like view of the opposite section of thehub, showing the exterior. Fig. 4 is a perspective of the expandingring; Fig. 5, a perspective in detail of the shaft, the washer, and theclamping-nut. Fig. Gis a vertical section. Fig. 7 is a similar View onan enlarged 4 scale; Fig. 8, a side View, and Fig. 9 a plan view, ofpart of one of the sections of the hub, showing one of the slots toreceive the adjustable slides.

Reference being had to the drawings and the letters marked thereon, Arepresents a shaft or spindle, on which is mounted a metallic hub madein two sections, B C, each of which is provided with a right-angledrabbet, a b, on its periphery,which form a concentric chamber for thereception of a ring, D, of elastic materialssuch as rubber. 'Ihe ring Dis a little thicker and wider than the depth and width of the chamberformed in the periphery of the hub-sections.

E represents a ring of wood,vulcanized rubber, or other suitableinelastic material, upon the periphery of which is secured a band, F, ofexible materiale-such as leatherthe circumference of which is coatedwith emery or other suitable grinding or polishing material.

The hub-sections are provided with arms c d, respectively. The arms d ofthe section C have dovetailed slots e formed in them, in whichadjustable slides f operate, and are secured in any desired positionbythe set-screws g, which are attached on the inside of said arms d,project through the same, and bear upon the inner' surfaces of theslides.

In oneA face of the ring E are formed recesses h, which correspond inwidth with the slides f, and each recess is provided with anadjusting-screw, i. The inner surface of the ringE is plain or smooth,and passes over the outer surface or periphery of the elastic ring Dwhen being placed in position to form a grindingor polishing wheel.

In putting the two sections B C of the hub together the arms and spacesare made to alternate, as shown in Fig. 3, to afford ready access to theset-screws g, which bear upon the slidesf. 1

ln constructing a wheel according to my invention the section B of thehub is placed in position on the shaft A, with its outer surface bearingagainst the collar k. The ring D is then placed in the rabbet a, whenthe section C of the hub is brought up into position, the ring D fillingthe rabbet b therein. The ring D being a little wider than the Width ofthe chamber formed by the rabbets a b, a space, Z, is left between thesections B C, as shown in Fig. 2, and admits of the ring D beingcompressed by the nut m, resting on the washer n. The ring E, bearingthe band F, is now put in position around the ring D, and the nut mslightly screwed down to expand the ring D circumferentially and securethe ring E to the hub of the structure. The shaft is now revolved to seeif the wheel runs true laterally. If not, the outer ring, E, is adjustedby slacking the nut m and adjusting the screws z', as they may require,and extending the corresponding slide or slides, f, to rest upon saidscrews, which will change the lateral position of the ring E withrelation to the hub and enable the operator to adjust it to a, plane atIOO section, as shown in Fig. 2, the convex surface resting against theinner plain surface of the ring F, and the elastic ring forms a yieldingcushion to any irregularities in the periphery of the wheel as it isbrought in contact with a surface being ground or polished, therebyrequiring no soft leather, as is usually made necessary to accommodateany unevenness or irregularities in the surface or circumference of theordinary abrading-whcel.

The wheel having been once balanced and properly set with reference tothe shaft, it rcquires no further attention, and may have itsworking-surfaces renewed several times witlr out interfering with thebalancing of the wheel.

After the wheel has been properly set on the shaft the posit-ion oftheslidesf is marked on the ring E, and the slides withdrawn from therecesses h moved back in their slots c and secured by the set-screws g,in which posit-ion the slides are out cf the way of the ring E when itis desired to remove it. When it becomes necessary to remove the ring Eor renew the band F, or to substitute a new ring, it is only necessaryto slacken the nut m, which will release the elastic ring D and permitthe removal of said ring E. To replace it in proper working position,the slides f are moved out to the lines marked on the ring, (which willagain set it at right angles to the shaft,) when the nut m is drawn upand the elastic ring D expanded, as in the first instance.

When a {lat-faced wheel is used, it can be set sufficiently correct bythe eye without the use of the slides. By my construction the outer ringcarrying` the abrading-surface is held by expansion of the elastic ringD,wl1ich at the same time serves as a cushion for the workingsurface ofthe wheel, and the securing and releasing of the ring carryingr theabrading-surface is accomplished by the manipulation of the nut on. onlyon the shaft of the wheel, whereas heretofore it has been necessary toremove the nut and collar from the shaft before the polishing-wheelcould be removed, thus effecting a saving of time and wear of the parts.

Having thus fully described my invention, what I claim isl. A grindingor polishing wheel having a hub made in separable sections, incombination with a ring of wood or other inelastic inaterial having aplain or smooth inner surface, an outer flexible band provided with anabrad ing-surface, an elastic annulus interposed between the hub and thesaid ring, and a shaft and clamping-nut, substantially as described.

2. A grinding or polishing wheel having a sectional hub, in combinationwith an inelastic l ring carrying a band provided withanabrading-surface, an elastic annulus between said hub and ring, ashaft and clamping-nut, and means, substantially as described, foradjust ing the ring laterally upon the hub and with reference to theshaft, as and for the purpose set forth.

3. A grinding or polishing wheel having a sectional hub with aconcentric chamber formed in its periphery, in combination with anouterinelastie ring havingaplain or smooth inner surface and an outeralnadingsurfaec, an elastic ring slightly larger than said chamber,interposed between said hub and outer ring, and a screw and nut forcompressing the elastic ring laterally and expanding itcircumferentially, sulistantially as described.

d. A grinding or polishing wheel having a hub made in separablesections, cach having a right-angled rabbet in its periphery forming aconcentric chamber, an elastic ring of slightly greater width and depththan said chamber, an inelastic ring,a flexible band provided with anabrading-surface,and aclamping device for compressing the elastic ring,expanding the same circumferentially, and securing the polishing-ring tothe hub, substantially as described.

5. Agrinding or polishing wheel having a hub provided withradially-adjustable slides, an outer ring having an abrading-surface andprovided with adjusting-screws in one face thereof, in combination withan elastic cushion between the hub and the outer ring, substantially asdescribed.

(3. A grinding 01 polishingwhecl having a sectional hub provided witharms in which radial slots are formed, in combination with slides fittedto said slots, an outer ring having au abradingsurface and recessesprovided with adjusting-screws, an interposed elastic body between thehub and the ring, and a screw and nut for expanding said body,wherebythe ring is secured to the hub,substantially as described.

7. A wheel composed of two laterallyadinstable hubsections, an outerring of wood or other inelastic materialhaving a smooth inner surfaceand an outer abradingsurfaec, an elastic annulus interposed between saidscc tions and ring, and a clamping device for compressing said annulus,and expanding it between the ring and hub-sections, substantially asdescribed.

In testimony whcrcofI affix my signature in presence of two witnesses.

LUCI AN lt. NOURSE.

\Vitncsscs:

Giras. B. CAs'rLic, JOHN G. Samana.

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